Dr. Dan Killam on Nostr: When clams retract into their shell from threats, that has a cost. They can't eat or ...
When clams retract into their shell from threats, that has a cost. They can't eat or breathe new O2, and pulling the shell closed uses energy while staying open is "free". Many clams can habituate to repeated stimuli. It is a cost-benefit analysis that is always happening. Clams in captivity may stop closing altogether. I found that giant clams stay open in daylight to maximize photosynthesis of their symbionts, closing at night to protect themselves from predators. #clamFacts
Published at
2024-11-19 16:56:13Event JSON
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